/**
 * This file is part of Graylog.
 *
 * Graylog is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Graylog is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Graylog.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.graylog2.streams.matchers;

import org.graylog2.plugin.Message;
import org.graylog2.plugin.streams.StreamRule;

public class ContainsMatcher implements StreamRuleMatcher {
    @Override
    public boolean match(Message msg, StreamRule rule) {
        final boolean inverted = rule.getInverted();
        final Object field = msg.getField(rule.getField());

        if (field != null) {
            final String value = field.toString();
            return inverted ^ value.contains(rule.getValue());
        } else {
            return inverted;
        }
    }
}
